L25D

[sketchyphish]

I am looking to build my first amp with help from a friend in electronics. Ive been looking around and found that the L20D is very popular, but on more searching have decided to go for the L25D although ATM i dont know the differences between them. Anyone got any idea's or comments ??

Also i was finding it hard to work out what power supply to use....
At first i was thinking im gonna need to get a toroid of about 60-70v, but thats why im here.
From what i am aware the actual peak voltage from a rectified ac power supply is actually 1.414 times the amount. i.e 45vac would get me about 63.6vdc ? Correct me if im wrong as im sure i read somewhere that you then times the peak by about 0.63 to get the actual output.
YES THIS CONFUSES ME......so any help would be appriciated.
I need to work out as well whether i can use a single say 600va supply for 2xL25D. Again it was suggested to provide about 1.25 times the required maximum power.
If i get a toroid with 2x50vac secondaries and connect the correct two wires together will i end up with a three wire 50-0-50 ??
Once again guys thanks for any advice and please feel free to enlighten me on anything i am clearly missing.

Peace

[theAnonymous1]

If you don't mind reading a bit, this link will answer most of your questions.....

Elliott Sound Products - Linear Power Supply Design

[noah katz]

Why linear?

I've been reading this forum like crazy lately and the consensus seems to be that you can't beat these SMPS for price and quality

Connexelectronic

Re L25D vs. L20D vs. L15D, these are in decreasing order of suitable voltage ranges.

I believe in Table 1, p.4 of the below link that AMP7S-150 corresponds to thge L15D and AMP7S-200 to the L20D.

http://www.inductor.com/irf/iraudamp7s.pdf

I get the impression that the designer of these modules favors the L15D for sound quality

IRS2092 (IRAUDAMP7S) + IRFI4019